Breech mechanism for guns.



Patented Got. 3, I899. MURRAY.

vNo. 634,238.

A. G. HADBOBK 1%, S. M.

BREECH EZEGHANWM FDR GUNS.

(Application filed July 24, 1899.) (No Model.) 14 Sheets--Sheet No. 634,238. Paienfied Oct. 3, I899. A. G. HADCOCK & S. M. MUB%AY. BREECH MECHANISM FOR GUNS.

(Application filed July 24, 1899.) (No Model.) l4 Sheets-8heet 2.

No. 834,238. Patented 0m. 3, I899. IA. G. HADGUGK & S. M; MURRAY.

BREECH MECHANISM FOR GUNS" (Application filed July 24, 1899.)

v I4 Sheets Sheet 3 No. 634,238. Patented Oct.- 3, I899. A. G. HADCOCK & s-. M. MURRAY. snsscn MECHANISM FOR suns.

(Application filed July 24, 1899.) (N0 Model-7 l4 Sheets-Sheet 4.

v No. 634,238. Patented on. 3, I899.

A. a. HADCUCK & s. m. mummy.

BREEGH MECHANISM FOR GUNS.

(Applicgtion flied July 24, 1899') (No Modei.)

14 $heets-Sheet s.

N0. 534,238 I v Paienwd Got. 3, i899. A. G. HAHEQCi $1. 3. $65. WURRAY. BBEEGH HEGHANISWE FER M5568.

(Application flied July 24, 1899.) (Rio Model.) l4 Sheets$heei 6.

I 7 A f No. 634,238. Patented Oct. 3, I899.

A. G. HA-DCOBK 8:. S. M. MURRAY.

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BREECH MECHANISM FUR GUNS.

(Application filed July 24, 1899.)

(Ho Modei.) l4 sheets-sheet a.

No. 634,238. Patented Oct. 3, I899. A. G. HADCOCK &. S. M. MURRAY.

BREECl-l MECHANISM FOR GUNS.

(Application filed July 24, 1899.)

(No Model.) l4 Sheets-Sheet 9.

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BREECH MECHANISM FOR GUNS.

(Application filed July 24, 1899) No. 634,238. Patented on. 3, 1899.

A, G. HADCOGK -&,-S. M. MURRAY. BREEC'H mEcHAmsm FOR GUNS.

(Application med July 24, 1899.)

(No Model.) l4 Shojetsr-Sheet No. 634,238. Fatented 0m. 3, I899.

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(Application filed July 24, 1899. I

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@REEQH EiECl-MNISM FOR GUNS.

(Application filed m 24, 1899.) I

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(Application filed July '24, 1899.)

Nita rates ALBERT GEORGE IIADCOCK. AND STEPHEN IWIAGUIRE MURRAY, OF NEVV- CASTLE-UPON-TYNE ENGLAND, ASSIGNORS -TO THE SIR \V. G. ARM- STRONG, VVI'IITWORTHj& COMPANY, LIMITED, OF SAME PLACE.

Basses MECHANISM FOR cuss.

SPECIFICATION forming part of Letters Patent No. 634,238, dated October 3, 1899.

' Application filed July 24, 1899. Serial No. 724,944. (No model.)

To alt whom it may concern.-

Be it known that we, ALBERT GEORGE HAD- COCK, l'ate R. A., and STEPHEN MAGUIRE IURR'AY, engineer, subjects of the Queen of Great Britain, residing at Elswick Works, Neweastle-upon-Tyne, England, have invent- I ed certain new and useful Improvements in the Breech Mechanismof Guns, of which the following is a specification.

This invention relatestothe breech mechanism of quick-firing or other guns (espe-- cially those which have the De Bange or a kindred system of obturation) in which the divided breech-screw after being turned for unlocking is swung clear of the opening of the gun; and its object is to enable the angle of the obturator pad' and the amount etthe ma terial of the breech-screw and gun cut away in the interruption of the thread to be redu'ced to a minimum. For this purpose the axis about which the carrier-arm turns in place of being stationary, as is usual, shifts its position, the arm turlning about one cenof the gun with the breech mechanism removed. Figs. 4;, 4*, 4, 4, 4, 4, and 4 are horizontal sections of the rear of the gun with the breech mechanism removed. Figs. 5, 5, 5, 5, 5, o and 5 are rear elevations of the carrier-arm c. Figs. 6, 6", 6, (3", 6, 3 and 6 are plans of the carrier-arm 0. Figs. 7, 7, 7, 7, 7, 7", and 77' are elevations of the pin f. Figs. 8, 8 8, 8, 8, 8, and 8 are plans of the pinf. Figs. 9 and 9 and 10 and 10 are respectively elevations and plans of the eccentric block gt Figs. 9, 9, and 9" and 10, 10, and 1O are respectively elevations and plans of the second arm 7;.

a is the gun, having fixed to it lugs b, between which the carrier-armc works.

11 is the breeclrblocl: pivoted to the carrierarm.

6 is the handle pivoted to the carrier-arm by which the breech is opened and .closed. The mechanism by which this is done forms no part of the present invention and is not shown in the drawings. It may be of any of the usual types.

f is the pin forming the pivot of the carrier-arm.

In the arrangement shown at Figs. 1 to 10 the carrier-arm c has fixed to it lugs c, which work in grooves b in the lugs 17 on the gun. The'pin f is fixed to the lugs b, fitting the holes I) in them. 9 is an eccentric block on the pinsfand working in a hole in the arm a. v

In Figs. 1 to ,1 O the carrier-arm c has-fixed to it lugs c, which work in grooves b in the lugsb on the gun, and the pin fis-fixedto 1 the eccentrics g, which work in the holes 5 being prevented from dropping out by pins projecting into grooves in them.

In Figs. 1 to 8 the carrier-arm c has fixed to it lugs c, which work ingrooves b in the lugs b on the gun; but the blocks 9 are dispensed with, the pin f being fixedto the carrier-arm c and working in elongated slots b in the lugs b. v

In Figs. 1 to 10 the carrier-arm c is pivoted to asecond arm h, pivoted to lugs b on the gun, the carrier-arm during the first part of its motion turning about the forward pivot and afterward about the rearward one.

The carrier-arm o is at first prevented from turning about the pivot f by the projection c, which engages with a recess is in the guri. The motioh about the :pivot 72. is limited by the tail end of the arm'h coming against the sidelef the gun. In this case the lugs b on the gun, between which the carrier arm works, are dispensed ivith.

Figs. 1to 10 show an arrangement similar to that last described; but there is only a single lug b and the pin f extends above and below the carrier-arm, its ends working in the elongated holes b inthe lugs b, and so limit the motion about the pivot h. 1

Figs. [i to 1O show an arran ementsimilar to that shown in Figs. 1 to 1 5'; but in, this case the projection c on the carrier-arm, and the recess 70 in the gun are dispensed with,- the carrier-arm being prevented from turning.-

about its pivotfduring the first part of its motion by the peculiar form of the pin f and holes b Figs. 1 to 8 resemble the previous figures; but the arm h is dispensed with, the pin f, working in blocks 9, free to slide in the slots b inthe lugs 12.

Ve claim- 1. The combination of a carrier arm, a breech-block pivoted to it, a pivot about which the carrier-arm turns, and means for shifting the position of the pivot during the turning.

2. The combination of a carrierarm, a

breech-block pivoted to it, lugs on the gun between which the carrier-arm works, a pin connecting the czirrier-arm to the lugs, and means for shifting the axis. about which the carrier-arm turns.

3. The combination of :1. carrier-arm, a breech-block pivoted to it, lugs on the gun between which the carrier-arm works, camgrooves in the lugs, projections on the carrier-arm working in the cam-grooves, an' a. pin connecting the carrier-arm to the lugs.

4. The combination of a carrier-arm, a breech-block pivoted to it, lugs on the gun between which the carrier-arm works, emngrooves in the lugs, project-ions on the carrier-arm working in the emu-grooves, a pin fixed to the lugs, and an eccentric block on the piirworking in holes in the carrier-arm.

ALBERT GEORGE HADCOCk. STEPHEN MAGUIRE MURRAY. \Vitnesses:

CHA LES RICHARD Fox ENGELBACH, 

